[PHP] 纯文本查看 复制代码 <!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" >
<style type="text/css">
.form-control{
width: 200px;
margin-bottom: 20px;
}
.btn{
width: 200px;
margin-bottom: 20px;
}
</style>
</head>
<body>
<?php
error_reporting(E_ALL ^ E_NOTICE);
if (!empty($_POST)) {
$num1 = $_POST['num1'];
$num2 = $_POST['num2'];
$result = 0;
$fuhao = $_POST['fuhao'];
if ($fuhao == '+') {
$result = $num1 + $num2;
}elseif ($fuhao == '-') {
$result = $num1 - $num2;
}
elseif ($fuhao == '*') {
$result = $num1 * $num2;
}
elseif ($fuhao == '/') {
if ($num2 != 0) {
$result = $num1 / $num2;
} else {
echo "<script>alert('除数不能为0！！')</script>";
}
}
} else {
echo "请输入数字";
}
?>
<div style='margin:0 auto; width: 300px;margin-top: 10px;'>
<form action="" method="post">
<input class="form-control" type="text" name="num1" value="<?php echo $num1;?>">
<select class="form-control" name="fuhao" id="">
<option value='+' <?php if($fuhao == '+'){echo "selected='selected'";}?>>+</option>
<option value='-' <?php if($fuhao == '-'){echo "selected='selected'";}?>>-</option>
<option value='*' <?php if($fuhao == '*'){echo "selected='selected'";}?>>*</option>
<option value='/' <?php if($fuhao == '/'){echo "selected='selected'";}?>>/</option>
</select>
<input class="form-control" type="text" name="num2" value="<?php echo $num2;?>">
<input class="btn btn-primary" type="submit" value="=">
<input class="form-control" type="text" name="result" value="<?php echo $result;?>">
</form>
</div>
</body>
</html> | 
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